50 Cent Clowns Diddy For Bombing Kid Cudi's Car

50 Cent is keeping a close eye on Diddy's sex trafficking trial. 

Not just because he's curious,. He needs to stay abreast of what's going on to keep successfully mocking the woman-beater.

Fif already clowned him after Kid Cudi testified that he broke into his house and locked his dog in the bathroom for dating Cassie.

The G-Unit founder followed that up by reacting to Cudi's claim that Diddy set his Porsche on fire with a Molotov cocktail.

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"😆Molotov Diddy was doing old school sh*t out here," wrote 50 next to photos of Cudi's damaged vehicle. "Old killer Rat Jimmy threw one them at us. LOL @50centaction."

50 is referring to his longtime foe Jimmy Henchman, who the feds say used a Molotov cocktail against G-Unit members after they assaulted his then-14-year-old son.

Any reaction to 50's post?